import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
Vue.use(VueRouter)


const routes = [

]

const router = new VueRouter({
        routes: [
            { path: '/', redirect: '/login' },
            { path: '/login', component: Login },
            {
                path: '/home',
                component: Home,
                redirect: '/welcome',
                children: [{ path: '/welcome', component: Welcome },
                    { path: '/users', component: Users }
                ]
            }
        ]
    })
    //挂载路由导航守卫
router.beforeEach((to, from, next) => {
    //to 将要访问的路径
    //from代表从哪个路径跳转而来
    //next是一个函数，表示放行
    // next()放行 next('/login') 强制跳转
    if (to.path === '/login') return next()
        //获取token
    const tokenStr = window.sessionStorage.getItem('token')
    if (!tokenStr) return next('/login')
    next()
})

export default router